JP5970995B2 - Electronic equipment board mounting structure - Google Patents

Description

  The present invention relates to a mounting structure for a board (option board) that is detachably mounted on a case for an electronic device such as a general-purpose inverter.

4 and 5 show conventional board mounting structures for optional boards such as communication cards mounted on the general-purpose inverter described above. In each figure, 1 is a molded resin case, 2 is a mounting frame, 3 is a detachable operation panel (touch panel), and 4 is a resin upper cover (control circuit terminal block cover) attached to the opening of the case 1. 5 is a terminal cover of the main circuit terminal block, 6 is a control circuit terminal block, 7 is an optional board such as a communication card that is mounted in parallel with the control circuit terminal block 6 and is detachably mounted inside the case 1.

Here, the optional board 7 is an optional product that the user additionally equips as necessary, and is combined with a parent board (main power circuit board, control circuit board) built into the product from the beginning in a two-story manner. It is detachably mounted on the case 1 and is used by being connected to another parent board via, for example, a bottom entry connector. Further, in order to secure the option board 7 to a predetermined mounting position, in the conventional structure, the option board 7 via a pair of left and right latch (engaging claw) 8 erected on the case 1 as shown in FIG. 5 It is engaged and held in a snap-fit manner.

  That is, when the option board 7 is mounted, the option board 7 is inserted between the left and right latches 8 with the upper cover 4 of the case 1 removed, and a connector is connected to fix it to the mounting position. When the option board 7 is to be removed, the claws of the latch 8 are pushed sideways using a screwdriver or the like, and the option board 7 is pulled out together with the connector.

  As the above-mentioned board mounting structure, a method of supporting via a connector and a latch (engagement claw) as described above is disclosed in Patent Document 1, for example.

JP 2000-59054 A (FIG. 3)

  By the way, when mounting the above-described option board 7 on the case 1, it is necessary that the attaching / detaching operation can be easily performed and that unnecessary mechanical stress is not applied to the chip parts mounted on the circuit board during the attaching / detaching operation. .

  In this respect, the conventional substrate mounting structure described above has the following problems. That is, since the control circuit terminal block 6 and the like are arranged in a narrow space of the case 1 as shown in FIG. In addition, mechanical stress is applied to the circuit board 7 as the latch 8 is engaged and disengaged, which may cause unnecessary stress on the components mounted on the board, and a measure for improving the mounting structure is desired. .

  The present invention has been made in view of the above points, and an object of the present invention is to improve an electronic apparatus in which a substrate can be easily attached and detached, and unnecessary mechanical stress is not applied to the substrate and the mounting component in accordance with the attachment and detachment operation. It is to provide a substrate mounting structure.

In order to achieve the above object, according to the present invention, in an electronic device in which a substrate is detachably mounted inside a case via a connector, and an upper cover is attached to the opening of the case so as to cover the substrate, Provided on the inner surface of the upper cover is a holding frame formed corresponding to the outer shape of the substrate and a pressing spring member for pressing and holding the substrate at the mounting position. The pressing spring member is specifically as follows. It can be configured in a manner.
(1) the pressing spring member integrally molded on the top cover comprising a resin molded article.
(2) the pressing "shape to" the shape of the spring member, or you formed "arcuate".

  According to the above-described substrate mounting structure, the troublesome work of engaging and disengaging the substrate and the latch in a narrow space as in the conventional structure is not necessary, and the substrate can be easily attached and detached. In other words, when the board is attached, the board can be pressed and held in place with the spring force of the holding spring provided on the inner surface of the upper cover simply by attaching the upper cover to the case with the board connected to the case. Sometimes the board can be pulled out with the connector just by removing the top cover from the case.

  Further, by integrally molding the holding spring on the upper cover made of molded resin, it can be manufactured at a low cost without increasing the number of parts and the number of assembly steps.

It is a schematic cross section showing the board | substrate attachment structure by the Example of this invention. It is the perspective view which looked at the upper cover with a pressing spring member in FIG. 1 from the inner surface side. It is a block diagram of the upper cover from which the shape of a presser spring member differs from FIG. 2, Comprising: (a), (b) is the perspective view seen from the inner surface side and the outer surface side, respectively. It is a bird's-eye view of a part of case of a general-purpose inverter shown as a conventional example of electronic equipment. FIG. 5 is an overhead view showing an attachment structure of an option board mounted on the general-purpose inverter of FIG. 4.

  Hereinafter, an embodiment of the present invention will be described based on an example shown in FIGS. 1 to 3 by taking an option board mounted inside a case of a general-purpose inverter as an example. In the drawing of the embodiment, members corresponding to those in FIG. 4 and FIG.

  1 and 2, reference numeral 1 denotes a case of a general-purpose inverter (see FIGS. 4 and 5), and 4 denotes an upper cover (resin molded product) attached to the opening of the case 1. In addition to the standard parent board (main circuit board, control circuit board) 9, an optional board 7 such as a communication card is mounted in a two-story structure above it. The main board 9 is connected via a connector 7a. The illustrated option board 7 is a single-sided board, and the connector 7a and the circuit component 7b mounted on the board are disposed on the lower surface side of the board 7.

  On the other hand, the upper cover 2 (see FIG. 2) that covers the option board 7 and adheres to the opening of the case 1 has a presser spring member 4a having a “U” shape facing the upper surface of the option board 7. Is formed by integral molding so as to project on the inner surface side of the cover. 4b is an engagement claw provided on the rear edge of the upper cover 2 and inserted into the engagement groove 10 (see FIG. 5) of the case 1, and 4c is a fastening screw through hole for screwing the upper cover 4 to the case 1. Reference numerals 4 d denote holding frames formed on the inner surface side of the cover corresponding to the four outer corners of the option substrate 7.

In mounting the option board 7 with the above configuration, as a procedure, first, the upper cover 4 is removed from the case 1, and then the connector 7 a of the option board 7 is inserted and connected to the parent board 9. When the upper cover 4 is attached to the case 1 in this temporarily supported state and screwed, the holding frames 4d formed on the inner surface side of the upper cover 4 fit into the four corners of the option substrate 7, and the holding spring member 4a is optional. The substrate 7 is pressed with a spring force F from the upper surface side. As a result, the option board 7 is securely pressed and held at a predetermined mounting position. Further, when removing the option board 7, it can be easily taken out from the case 1 by pulling out the connector 7a of the option board 7 with the upper cover 4 removed in the reverse order of the above procedure. Unlike the conventional board mounting structure, the troublesome engagement / disengagement work of the latch 8 in a narrow space is not required, and the optional board 7 and the mounting circuit component 7b associated with the engagement / disengagement operation of the latch 8 are unnecessary. There is no risk of additional stress.

  Further, regarding the shape of the presser spring member 4a integrally formed on the inner surface side of the upper cover 4, the spring shape is a "<" shape in FIG. 2, but as shown in FIGS. The same effect can be obtained even if the both ends of the member 4a are formed in an “arch shape” continuous with the cover.

1 Case 4 Upper cover 4a Pressing spring member 7 Option board 7a Connector

Claims (3)

In an electronic device in which a substrate is detachably mounted inside a case via a connector, and the upper cover is attached to the opening of the case so as to cover the substrate,
A board mounting structure for an electronic device , comprising: a holding frame formed on an inner surface of the upper cover so as to correspond to an outer shape of the board; and a holding spring member that holds the board in a mounting position.   2. The board mounting structure according to claim 1, wherein the holding spring member is integrally formed with an upper cover that is a resin molded product.   2. The board mounting structure for an electronic device according to claim 1, wherein the shape of the presser spring member is "U" or "arch".

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